hi would anyone have any idea what may be wrong with my car sometimes when stationery if i turn steering to left or to the right it will feel notchy/juddering and it comes with a sort of grunt noise from under bonnet.my tought was the tensioner and belt so change them still got prob so i thought must be power steering pump so i was told there were 2 sorts a ZF and a saginor so i striiped it off car to find it was neither of them it was in fact a K Y B i spoke with vw they are trying to tell me that it should be a saginor on my car as the K Y B was fitted to petrol versions my car is a vw golf gt tdi pd 150 i would have no probs putting a saginor on as they say it what should be on but the fact of the matter is the pipe work for them is slightly different. so any ideas with regards to the noise and notchiness and secondly with regards to the pump?? what should be on it etc

 

how is the fluid?

 

sorry i didnt mention fluid but i changed it made no difference.